Culture

Most hybrids are of Monarda didyma parentage and are easily grown in average, medium to wet, moisture retentive soils in full sun to part shade. Those of Monarda fistulosa parentage are more tolerant of drier soils. Prefers rich, humusy soils in full sun, but appreciates some afternoon shade in hot summer climates such as the St. Louis area. Soils must not be allowed to dry out. Remove spent flowers to improve plant appearance and possibly to prolong bloom. Divide clumps every 3-4 years to prevent overcrowding and to control mildly spreading tendencies (slowly spreads by rhizomes). Provide plants with good air circulation to help combat fungal leaf diseases.

Noteworthy Characteristics

Monarda is a genus of about 15 species of annuals and herbaceous perennials from prairies and woodlands in North America. They flower from mid-summer to early fall and are loved by bees, hummingbirds and other pollinators.

Problems

Powdery mildew can be a serious problem with some of the monardas. Susceptibility to foliar diseases in general increases if plants are grown in dry soils or are allowed to dry out. Rust is also an occasional problem.